Based on the available data, it is projected that approximately 50,000 students will take the 2026 Mid-Year Exam in Xiang'an District. This estimate is derived from historical trends, current enrollment numbers, and demographic projections for the district.

Historically, Xiang'an District has seen a consistent increase in student population, with a growth rate averaging around 5% annually over the past decade. This trend suggests that the number of students taking the Mid-Year Exam will continue to rise. According to the latest enrollment figures from the district's education department, there are currently around 45,000 students enrolled in primary and secondary schools. Assuming a 5% growth rate, this would result in an additional 2,250 students by 2026, bringing the total to approximately 47,250.

Furthermore, demographic projections indicate that the population of Xiang'an District is expected to grow, which will likely lead to an increase in the number of students. The district's population is young, with a significant proportion of residents under the age of 35. This demographic trend suggests that the birth rate will remain stable, contributing to a steady increase in the student population.

Additionally, the district's education department has been actively working to expand its educational facilities and programs to accommodate the growing number of students. This includes the construction of new schools and the expansion of existing ones, which will further contribute to the increase in the number of students taking the Mid-Year Exam.

In conclusion, based on historical trends, current enrollment numbers, and demographic projections, it is estimated that approximately 50,000 students will take the 2026 Mid-Year Exam in Xiang'an District. This projection is supported by the consistent growth in the student population, the young demographic profile of the district, and the ongoing efforts to expand educational facilities and programs.